src/console/btext_console.c

   1 /*
   2  * Procedures for drawing on the screen early on in the boot process.
   3  *
   4  * Benjamin Herrenschmidt <benh@kernel.crashing.org>
   5  *
   6  *   move to coreboot by LYH yhlu@tyan.com
   7  */
   8
   9 #if 0
  10
  11 #include <delay.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <arch/io.h>
  15
  16 #include <console/console.h>
  17 #include <device/device.h>
  18 #include <device/pci.h>
  19 #include <device/pci_ids.h>
  20 #include <device/pci_ops.h>
  21
  22 #endif
  23
  24 #include <arch/io.h>
  25 #include <string.h>
  26 #include <console/console.h>
  27
  28
  29 #include <arch/byteorder.h>
  30
  31 #include <console/btext.h>
  32
  33 //#define NO_SCROLL
  34
  35 #ifndef NO_SCROLL
  36 static void scrollscreen(void);
  37 #endif
  38
  39 static void draw_byte(unsigned char c, u32 locX, u32 locY);
  40 #if 0
  41 static void draw_byte_32(unsigned char *bits, u32 *base, u32 rb);
  42 static void draw_byte_16(unsigned char *bits, u32 *base, u32 rb);
  43 #endif
  44 static void draw_byte_8(unsigned char *bits, u32 *base, u32 rb);
  45
  46 static u32 g_loc_X;
  47 static u32 g_loc_Y;
  48 static u32 g_max_loc_X;
  49 static u32 g_max_loc_Y;
  50
  51 #define CHAR_256 0
  52
  53 #if CHAR_256==1
  54 #define cmapsz  (16*256)
  55 #else
  56 #define cmapsz        (16*96)
  57 #endif
  58
  59 extern unsigned char vga_font[cmapsz];
  60
  61 u32 boot_text_mapped;
  62
  63 boot_infos_t disp_bi;
  64
  65 #define BTEXT
  66 #define BTDATA
  67
  68
  69 /* This function will enable the early boot text when doing OF booting. This
  70  * way, xmon output should work too
  71  */
  72 void
  73 btext_setup_display(u32 width, u32 height, u32 depth, u32 pitch,
  74                     unsigned long address)
  75 {
  76         boot_infos_t* bi = &disp_bi;
  77
  78         g_loc_X = 0;
  79         g_loc_Y = 0;
  80         g_max_loc_X = width / 8;
  81         g_max_loc_Y = height / 16;
  82 //      bi->logicalDisplayBase = (unsigned char *)address;
  83         bi->dispDeviceBase = (unsigned char *)address;
  84         bi->dispDeviceRowBytes = pitch;
  85         bi->dispDeviceDepth = depth;
  86         bi->dispDeviceRect[0] = bi->dispDeviceRect[1] = 0;
  87         bi->dispDeviceRect[2] = width;
  88         bi->dispDeviceRect[3] = height;
  89         boot_text_mapped = 0;
  90 }
  91
  92 /* Here's a small text engine to use during early boot
  93  * or for debugging purposes
  94  *
  95  * todo:
  96  *
  97  *  - build some kind of vgacon with it to enable early printk
  98  *  - move to a separate file
  99  *  - add a few video driver hooks to keep in sync with display
 100  *    changes.
 101  */
 102
 103 void
 104 map_boot_text(void)
 105 {
 106 #if 0
 107         unsigned long base, offset, size;
 108         boot_infos_t *bi = &disp_bi;
 109
 110         if (bi->dispDeviceBase == 0)
 111                 return;
 112         base = ((unsigned long) bi->dispDeviceBase) & 0xFFFFF000UL;
 113         offset = ((unsigned long) bi->dispDeviceBase) - base;
 114         size = bi->dispDeviceRowBytes * bi->dispDeviceRect[3] + offset
 115                 + bi->dispDeviceRect[0];
 116         bi->logicalDisplayBase = ioremap(base,0x800000 );
 117         if (bi->logicalDisplayBase == 0)
 118                 return;
 119 //      bi->logicalDisplayBase += offset;
 120 #endif
 121         boot_text_mapped = 1;
 122 }
 123
 124 /* Calc the base address of a given point (x,y) */
 125 static unsigned char * BTEXT
 126 calc_base(boot_infos_t *bi, u32 x, u32 y)
 127 {
 128         unsigned char *base;
 129 #if 0
 130         base = bi->logicalDisplayBase;
 131         if (base == 0)
 132 #endif
 133                 base = bi->dispDeviceBase;
 134         base += (x + bi->dispDeviceRect[0]) * (bi->dispDeviceDepth >> 3);
 135         base += (y + bi->dispDeviceRect[1]) * bi->dispDeviceRowBytes;
 136         return base;
 137 }
 138
 139 /* Adjust the display to a new resolution */
 140 void
 141 btext_update_display(unsigned long phys, u32 width, u32 height,
 142                      u32 depth, u32 pitch)
 143 {
 144         boot_infos_t *bi = &disp_bi;
 145 #if 0
 146         if (bi->dispDeviceBase == 0)
 147                 return;
 148         /* check it's the same frame buffer (within 256MB) */
 149         if ((phys ^ (unsigned long)bi->dispDeviceBase) & 0xf0000000)
 150                 return;
 151 #endif
 152
 153         bi->dispDeviceBase = (u8 *) phys;
 154         bi->dispDeviceRect[0] = 0;
 155         bi->dispDeviceRect[1] = 0;
 156         bi->dispDeviceRect[2] = width;
 157         bi->dispDeviceRect[3] = height;
 158         bi->dispDeviceDepth = depth;
 159         bi->dispDeviceRowBytes = pitch;
 160         if (boot_text_mapped) {
 161 #if 0
 162                 iounmap(bi->logicalDisplayBase);
 163 #endif
 164                 boot_text_mapped = 0;
 165         }
 166         map_boot_text();
 167         g_loc_X = 0;
 168         g_loc_Y = 0;
 169         g_max_loc_X = width / 8;
 170         g_max_loc_Y = height / 16;
 171 }
 172
 173 void BTEXT btext_clearscreen(void)
 174 {
 175         boot_infos_t* bi        = &disp_bi;
 176         u32 *base       = (u32 *)calc_base(bi, 0, 0);
 177         u32 width       = ((bi->dispDeviceRect[2] - bi->dispDeviceRect[0]) *
 178                                         (bi->dispDeviceDepth >> 3)) >> 2;
 179         u32 i,j;
 180
 181         for (i=0; i<(bi->dispDeviceRect[3] - bi->dispDeviceRect[1]); i++)
 182         {
 183                 u32 *ptr = base;
 184                 for(j=width; j; --j)
 185                         *(ptr++) = 0;
 186                 base += (bi->dispDeviceRowBytes >> 2);
 187         }
 188 }
 189
 190 #if 0
 191 __inline__ void dcbst(const void* addr)
 192 {
 193         __asm__ __volatile__ ("dcbst 0,%0" :: "r" (addr));
 194 }
 195
 196 void BTEXT btext_flushscreen(void)
 197 {
 198         boot_infos_t* bi        = &disp_bi;
 199         u32  *base      = (unsigned long *)calc_base(bi, 0, 0);
 200         u32 width       = ((bi->dispDeviceRect[2] - bi->dispDeviceRect[0]) *
 201                                         (bi->dispDeviceDepth >> 3)) >> 2;
 202         u32 i,j;
 203
 204         for (i=0; i<(bi->dispDeviceRect[3] - bi->dispDeviceRect[1]); i++)
 205         {
 206                 u32 *ptr = base;
 207                 for(j=width; j>0; j-=8) {
 208                         dcbst(ptr);
 209                         ptr += 8;
 210                 }
 211                 base += (bi->dispDeviceRowBytes >> 2);
 212         }
 213 }
 214 #endif
 215
 216
 217 #ifndef NO_SCROLL
 218 static BTEXT void
 219 scrollscreen(void)
 220 {
 221         boot_infos_t* bi                = &disp_bi;
 222         u32 *src                = (u32 *)calc_base(bi,0,16);
 223         u32 *dst                = (u32 *)calc_base(bi,0,0);
 224         u32 width               = ((bi->dispDeviceRect[2] - bi->dispDeviceRect[0]) *
 225                                                 (bi->dispDeviceDepth >> 3)) >> 2;
 226         u32 i,j;
 227
 228         for (i=0; i<(bi->dispDeviceRect[3] - bi->dispDeviceRect[1] - 16); i++)
 229         {
 230                 u32 *src_ptr = src;
 231                 u32 *dst_ptr = dst;
 232                 for(j=width; j; --j)
 233                         *(dst_ptr++) = *(src_ptr++);
 234                 src += (bi->dispDeviceRowBytes >> 2);
 235                 dst += (bi->dispDeviceRowBytes >> 2);
 236         }
 237         for (i=0; i<16; i++)
 238         {
 239                 u32 *dst_ptr = dst;
 240                 for(j=width; j; --j)
 241                         *(dst_ptr++) = 0;
 242                 dst += (bi->dispDeviceRowBytes >> 2);
 243         }
 244 }
 245 #endif /* ndef NO_SCROLL */
 246
 247 void BTEXT btext_drawchar(char c)
 248 {
 249         u32 cline = 0;
 250
 251         if (!boot_text_mapped)
 252                 return;
 253
 254         switch (c) {
 255         case '\b':
 256                 if (g_loc_X > 0)
 257                         --g_loc_X;
 258                 break;
 259         case '\t':
 260                 g_loc_X = (g_loc_X & -8) + 8;
 261                 break;
 262         case '\r':
 263                 g_loc_X = 0;
 264                 break;
 265         case '\n':
 266                 g_loc_X = 0;
 267                 g_loc_Y++;
 268                 cline = 1;
 269                 break;
 270         default:
 271                 draw_byte(c, g_loc_X++, g_loc_Y);
 272         }
 273         if (g_loc_X >= g_max_loc_X) {
 274                 g_loc_X = 0;
 275                 g_loc_Y++;
 276                 cline = 1;
 277         }
 278 #ifndef NO_SCROLL
 279         while (g_loc_Y >= g_max_loc_Y) {
 280                 scrollscreen();
 281                 g_loc_Y--;
 282         }
 283 #else
 284         /* wrap around from bottom to top of screen so we don't
 285            waste time scrolling each line.  -- paulus. */
 286         if (g_loc_Y >= g_max_loc_Y)
 287                 g_loc_Y = 0;
 288         if (cline) {
 289                 for (x = 0; x < g_max_loc_X; ++x)
 290                         draw_byte(' ', x, g_loc_Y);
 291         }
 292 #endif
 293 }
 294 #if 0
 295 void BTEXT
 296 btext_drawstring(const char *c)
 297 {
 298         if (!boot_text_mapped)
 299                 return;
 300         while (*c)
 301                 btext_drawchar(*c++);
 302 }
 303
 304 void BTEXT
 305 btext_drawhex(u32 v)
 306 {
 307         static char hex_table[] = "0123456789abcdef";
 308
 309         if (!boot_text_mapped)
 310                 return;
 311         btext_drawchar(hex_table[(v >> 28) & 0x0000000FUL]);
 312         btext_drawchar(hex_table[(v >> 24) & 0x0000000FUL]);
 313         btext_drawchar(hex_table[(v >> 20) & 0x0000000FUL]);
 314         btext_drawchar(hex_table[(v >> 16) & 0x0000000FUL]);
 315         btext_drawchar(hex_table[(v >> 12) & 0x0000000FUL]);
 316         btext_drawchar(hex_table[(v >>  8) & 0x0000000FUL]);
 317         btext_drawchar(hex_table[(v >>  4) & 0x0000000FUL]);
 318         btext_drawchar(hex_table[(v >>  0) & 0x0000000FUL]);
 319         btext_drawchar(' ');
 320 }
 321 #endif
 322 static void BTEXT
 323 draw_byte(unsigned char c, u32 locX, u32 locY)
 324 {
 325         boot_infos_t* bi        = &disp_bi;
 326         unsigned char *base     = calc_base(bi, locX << 3, locY << 4);
 327 #if CHAR_256==1
 328         unsigned char *font     = &vga_font[((u32)c) * 16];
 329 #else
 330         unsigned char *font     = &vga_font[((u32)c-0x20) * 16]; // skip the first 0x20
 331 #endif
 332         u32 rb                  = bi->dispDeviceRowBytes;
 333
 334         switch(bi->dispDeviceDepth) {
 335 #if 0
 336         case 24:
 337         case 32:
 338                 draw_byte_32(font, (u32 *)base, rb);
 339                 break;
 340         case 15:
 341         case 16:
 342                 draw_byte_16(font, (u32 *)base, rb);
 343                 break;
 344 #endif
 345         case 8:
 346                 draw_byte_8(font, (u32 *)base, rb);
 347                 break;
 348         }
 349 }
 350 static u32 expand_bits_8[16] BTDATA = {
 351 #if defined(__BIG_ENDIAN)
 352     0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
 353     0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
 354     0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
 355     0xffff0000,0xffff00ff,0xffffff00,0xffffffff
 356 #elif defined(__LITTLE_ENDIAN)
 357     0x00000000,0xff000000,0x00ff0000,0xffff0000,
 358     0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
 359     0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
 360     0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
 361 #else
 362 #error FIXME: No endianness??
 363 #endif
 364 };
 365 #if 0
 366 static const u32 expand_bits_16[4] BTDATA = {
 367 #if defined(__BIG_ENDIAN)
 368     0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
 369 #elif defined(__LITTLE_ENDIAN)
 370     0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
 371 #else
 372 #error FIXME: No endianness??
 373 #endif
 374 };
 375 #endif
 376 #if 0
 377 static void BTEXT
 378 draw_byte_32(unsigned char *font, u32 *base, u32 rb)
 379 {
 380         u32 l, bits;
 381         u32 fg = 0xFFFFFFFF;
 382         u32 bg = 0x00000000;
 383
 384         for (l = 0; l < 16; ++l)
 385         {
 386                 bits = *font++;
 387                 base[0] = (-(bits >> 7) & fg) ^ bg;
 388                 base[1] = (-((bits >> 6) & 1) & fg) ^ bg;
 389                 base[2] = (-((bits >> 5) & 1) & fg) ^ bg;
 390                 base[3] = (-((bits >> 4) & 1) & fg) ^ bg;
 391                 base[4] = (-((bits >> 3) & 1) & fg) ^ bg;
 392                 base[5] = (-((bits >> 2) & 1) & fg) ^ bg;
 393                 base[6] = (-((bits >> 1) & 1) & fg) ^ bg;
 394                 base[7] = (-(bits & 1) & fg) ^ bg;
 395                 base = (u32 *) ((char *)base + rb);
 396         }
 397 }
 398
 399 static void BTEXT
 400 draw_byte_16(unsigned char *font, u32 *base, u32 rb)
 401 {
 402         u32 l, bits;
 403         u32 fg = 0xFFFFFFFF;
 404         u32 bg = 0x00000000;
 405         u32 *eb = expand_bits_16;
 406
 407         for (l = 0; l < 16; ++l)
 408         {
 409                 bits = *font++;
 410                 base[0] = (eb[bits >> 6] & fg) ^ bg;
 411                 base[1] = (eb[(bits >> 4) & 3] & fg) ^ bg;
 412                 base[2] = (eb[(bits >> 2) & 3] & fg) ^ bg;
 413                 base[3] = (eb[bits & 3] & fg) ^ bg;
 414                 base = (u32 *) ((char *)base + rb);
 415         }
 416 }
 417 #endif
 418 static void BTEXT
 419 draw_byte_8(unsigned char *font, u32 *base, u32 rb)
 420 {
 421         u32 l, bits;
 422         u32 fg = 0x0F0F0F0F;
 423         u32 bg = 0x00000000;
 424         u32 *eb = expand_bits_8;
 425
 426         for (l = 0; l < 16; ++l)
 427         {
 428                 bits = *font++;
 429                 base[0] = (eb[bits >> 4] & fg) ^ bg;
 430                 base[1] = (eb[bits & 0xf] & fg) ^ bg;
 431                 base = (u32 *) ((char *)base + rb);
 432         }
 433 }
 434
 435 void btext_init(void)
 436 {
 437         btext_setup_display(640, 480, 8, 640,0xfc000000);
 438 // Not realy init
 439 // It will be init in xlinit.c because We only can access fb after the device resource is allocated and enabled.
 440
 441 }
 442
 443 void btext_tx_byte(unsigned char data)
 444 {
 445         btext_drawchar(data);
 446 }
 447
 448 static const struct console_driver btext_console __console = {
 449         .init    = btext_init,
 450         .tx_byte = btext_tx_byte,
 451         .rx_byte = 0,
 452         .tst_byte = 0,
 453 };
 454